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Given the following piece of code:public class School{ public abstract double numberOfStudent();}which of the following statements is true?

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Given the following piece of code:public class School{ public abstract double numberOfStudent();}which of the following statements is true?
  • AThe keywords public and abstract cannot be used together.
  • BThe method numberOfStudent() in class School must have a body.
  • CYou must add a return statement in method numberOfStudent().
  • DClass School must be defined abstract.
Correct answer: D
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Class School must be defined abstract.